CTX32T-100-R Equivalent & Substitute Parts Reference

Part Overview

The CTX32T-100-R is a 10 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, rated for 150 mA with a maximum DC resistance of 2.1 Ohm in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Inductance	10 µH
Current Rating	150 mA
DC Resistance (DCR)	2.1 Ohm Max
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Shielding	Unshielded
Operating Temperature Range	-25°C ~ 85°C
Tolerance	±10%
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the CTX32T-100-R are qualified based on the following critical parameters:

Primary Matching Criteria:

Inductance: 10 µH (exact match required)
DC Resistance: 2.1 Ohm Max (exact match required)
Package / Case: 1210 (3225 Metric) or compatible footprint
Mounting Type: Surface Mount
Current Rating: Equal to or greater than 150 mA

Secondary Compatibility Factors:

Shielding configuration (unshielded preferred for direct replacement)
Operating temperature range (must encompass or exceed -25°C ~ 85°C)
Tolerance specification (±10% or tighter acceptable)

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with unshielded construction) and Functional Alternatives (meeting electrical requirements with variations in core material, shielding, or package designation).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Inductance (µH)	Current Rating (mA)	DCR (Ohm Max)	Package	Shielding	Core Type	Tolerance	Operating Temp (°C)	Product Status
CTX32T-100-R	Eaton - Electronics Division	10	150	2.1	1210 (3225 Metric)	Unshielded	Ceramic Drum Core, Wirewound	±10%	-25 ~ 85	Obsolete
1210-103J	API Delevan Inc.	10	297	2.1	1210 (3225 Metric)	Unshielded	Ferrite	±5%	-55 ~ 125	Active
74476410	Würth Elektronik	10	150	2.1	1210 (3225 Metric)	Unshielded	Ferrite Drum Core, Wirewound	±10%	-40 ~ 105	Active
AISM-1210-100K-T	Abracon LLC	10	150	2.1	1210 (3225 Metric)	Unshielded	Ferrite Molded	±10%	-40 ~ 85	Active
CM322522-100JL	Bourns Inc.	10	140	2.1	Nonstandard	Unshielded	Ferrite Drum Core, Wirewound	±5%	-40 ~ 125	Active
CM322522-100KL	Bourns Inc.	10	140	2.1	Nonstandard	Unshielded	Ferrite Drum Core, Wirewound	±10%	-40 ~ 125	Active
CMH322522-100KL	Bourns Inc.	10	150	2.1	1210 (3225 Metric)	Shielded	Ferrite Drum Core, Wirewound	±10%	-55 ~ 125	Active

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Preferred for Drop-In Replacement):

74476410 (Würth Elektronik, WE-GF Series): Matches all primary electrical parameters (10 µH, 150 mA, 2.1 Ohm DCR) with identical 1210 package and unshielded construction. Active product status with RoHS3 compliance and REACH unaffected certification. Operating temperature range -40°C ~ 105°C exceeds original specification. Drum core wirewound construction maintains functional equivalence. Highest inventory availability (2490 pcs).
AISM-1210-100K-T (Abracon LLC, AISM-1210 Series): Meets all primary electrical specifications with 1210 package and unshielded configuration. Active product with RoHS3 compliance and REACH unaffected status. Molded construction differs from original drum core type but maintains electrical performance. Operating temperature -40°C ~ 85°C aligns with original lower bound. Largest inventory (8982 pcs).

Tier 2 - Functional Alternatives (Acceptable with Design Verification):

1210-103J (API Delevan Inc.): Provides superior current rating (297 mA vs. 150 mA) with identical inductance and DCR. Tighter tolerance (±5%) and extended operating range (-55°C ~ 125°C). Active product status. Ferrite core material differs from original ceramic. Suitable for applications requiring higher current margin.
CMH322522-100KL (Bourns Inc., CMH322522 Series): Matches electrical parameters with shielded construction. Active product with RoHS3 compliance. Extended operating temperature (-55°C ~ 125°C). Shielding introduces electromagnetic isolation not present in original design; verify circuit compatibility before substitution.

Tier 3 - Limited Compatibility (Current Rating Below Specification):

CM322522-100JL and CM322522-100KL (Bourns Inc., CM322522 Series): Current rating of 140 mA falls below original 150 mA specification. Nonstandard package designation requires footprint verification. Acceptable only if circuit design permits reduced current margin or if thermal analysis confirms adequate derating.

Frequently Asked Questions (FAQ)

Q1: Can I use 1210-103J as a direct replacement for CTX32T-100-R?

A: 1210-103J qualifies as a functional substitute based on matching inductance (10 µH) and DC resistance (2.1 Ohm). The higher current rating (297 mA vs. 150 mA) provides additional design margin. However, the ferrite core material differs from the original ceramic core, and the tighter tolerance (±5%) may affect circuit tuning. Electrical verification is required for frequency-dependent applications.

Q2: What is the difference between unshielded and shielded inductors in this comparison?

A: The original CTX32T-100-R is unshielded, meaning magnetic field lines extend beyond the component body. CMH322522-100KL is shielded, confining the magnetic field. Shielded construction reduces electromagnetic interference but may alter inductance characteristics in high-density PCB layouts. Substitution with a shielded part requires circuit-level validation.

Q3: Why do some substitute parts show "Nonstandard" package designation?

A: CM322522-100JL and CM322522-100KL are designated as nonstandard package despite matching physical dimensions (3.20mm x 2.50mm) to the 1210 metric standard. This designation indicates the parts do not conform to standard package outlines but maintain mechanical compatibility. Verify PCB footprint acceptance before procurement.

Q4: Which substitute offers the best compliance profile?

A: 74476410 (Würth Elektronik) and AISM-1210-100K-T (Abracon LLC) both carry RoHS3 compliance and REACH unaffected certification with active product status. Both maintain identical electrical specifications to the original part. 74476410 offers superior inventory availability (2490 pcs).

Q5: Is the operating temperature range critical for substitution?

A: The original CTX32T-100-R operates from -25°C ~ 85°C. All active substitutes exceed this range, with most supporting -40°C ~ 125°C. If the application operates within the original temperature bounds, all substitutes are acceptable. Extended range provides additional design margin for thermal stress conditions.

Q6: Can I substitute based on inductance and current rating alone?

A: No. DC resistance (DCR) is equally critical. All qualified substitutes maintain 2.1 Ohm maximum DCR, matching the original specification. Substitution requires simultaneous matching of inductance, current rating, and DCR. Tolerance and core material variations are secondary considerations dependent on circuit application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message